图1-16是用火柴摆成的猪,想想看,如何移动2根火柴,使它变成四腿张开的猪?
图1-16 q8bWKvgwmI/bXj4uJRrUwejKGUpQgW+nJvbWSjWWY7wC1Glt4F7KCVU5NnEHe/lb